Biostar TA75A+ - Installing System Memory

Motherboard Manual
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2.3 INSTALLING SYSTEM MEMORY
A. DDR3 Modules
DDR3_A1 DDR3_A2 DDR3_B1 DB2DR 3_
1. Unlock a DIMM slot by pressing the retaining clips outward. Align a
DIMM on the slot such that the notch on the DIMM matches the
break on the Slot.
2. Insert the DIMM vertically and firmly into the slot until the retaining
chip snap back in place and the DIMM is properly seated.